Paste JSON, press Format, and get clean, indented, readable JSON — or an honest pointer to where it's broken. For API responses, config files, and logs. Free, no signup, and the data never leaves the device.
What counts as invalid JSON? Trailing commas, single quotes instead of double, unquoted keys, and comments are the classic four. Strict JSON allows none of them — this tool reports the position of the first problem.
Is pasted data safe here? Yes in the way that matters: formatting happens locally in the browser. Nothing is transmitted or stored — safe for tokens-free samples and configs (still, don't paste live secrets anywhere as a habit).